YES(O(1),O(n^2)) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^2)). Strict Trs: { sum(0()) -> 0() , sum(s(x)) -> +(sum(x), s(x)) , sum1(0()) -> 0() , sum1(s(x)) -> s(+(sum1(x), +(x, x))) } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^2)) We use the processor 'custom shape polynomial interpretation' to orient following rules strictly. Trs: { sum(s(x)) -> +(sum(x), s(x)) , sum1(s(x)) -> s(+(sum1(x), +(x, x))) } The induced complexity on above rules (modulo remaining rules) is YES(?,O(n^2)) . These rules are moved into the corresponding weak component(s). Sub-proof: ---------- TcT has computed the following constructor-restricted polynomial interpretation. [sum](x1) = 3*x1 + x1^2 [0]() = 0 [s](x1) = 1 + x1 [+](x1, x2) = x1 + x2 [sum1](x1) = x1 + x1^2 This order satisfies the following ordering constraints. [sum(0())] = >= = [0()] [sum(s(x))] = 4 + 5*x + x^2 > 4*x + x^2 + 1 = [+(sum(x), s(x))] [sum1(0())] = >= = [0()] [sum1(s(x))] = 2 + 3*x + x^2 > 1 + 3*x + x^2 = [s(+(sum1(x), +(x, x)))] We return to the main proof. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^2)). Strict Trs: { sum(0()) -> 0() , sum1(0()) -> 0() } Weak Trs: { sum(s(x)) -> +(sum(x), s(x)) , sum1(s(x)) -> s(+(sum1(x), +(x, x))) } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^2)) We use the processor 'custom shape polynomial interpretation' to orient following rules strictly. Trs: { sum(0()) -> 0() , sum1(0()) -> 0() } The induced complexity on above rules (modulo remaining rules) is YES(?,O(n^2)) . These rules are moved into the corresponding weak component(s). Sub-proof: ---------- TcT has computed the following constructor-restricted polynomial interpretation. [sum](x1) = 3*x1 + x1^2 [0]() = 1 [s](x1) = 1 + x1 [+](x1, x2) = x1 + x2 [sum1](x1) = x1 + 2*x1^2 This order satisfies the following ordering constraints. [sum(0())] = 4 > 1 = [0()] [sum(s(x))] = 4 + 5*x + x^2 > 4*x + x^2 + 1 = [+(sum(x), s(x))] [sum1(0())] = 3 > 1 = [0()] [sum1(s(x))] = 3 + 5*x + 2*x^2 > 1 + 3*x + 2*x^2 = [s(+(sum1(x), +(x, x)))] We return to the main proof. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak Trs: { sum(0()) -> 0() , sum(s(x)) -> +(sum(x), s(x)) , sum1(0()) -> 0() , sum1(s(x)) -> s(+(sum1(x), +(x, x))) } Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded Hurray, we answered YES(O(1),O(n^2))